Boiler



Jan. 12 ,-1926. 1,569,523

E. P. J. NICLAUSSE ET AL BOILER Filed April 20, 1923 4 Sheets-Sheet 1 ATTORNEYS- diafg Jan. 12,1926. 1,569,523

E. P. J. NICLAUSSE ET AL BOILER 2 Filed April 20, 1923 4 Sheets-Sheet 2 Ja n. 12,1926. 1,569,523

E. P. J.-NIGLAU$SE ET AL BOILER Filed April 20, 1923 4 Sheets-Sheet 5 MWF/VTORS i W wmwww Arromrys Jan. 12 1926. 11,569,523

E. P. .1 NiCLAUSSE ET AL I BOILER Filed April 20, 1923 4 Sheets-Sheet 4.

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. //V V; was [5/ f M 2220 MM. WWW/ Patented Jan. 12, 1926.

UNITED sTATEs 1,569,523 PATENT oFFicE.

ELIE PIERRE J'IILES NICLA'USSE AND ALBERT LOUIS NICLAUSSE, 0F PARIS, FRANCE.

BOILER,

Application filed. April 20, 1923. Serial No. 633,387.

To all whom it may concern:

Be it known that we, ELIE PIERRE JULEs NIOLAUSSE and ALBERT LOUIS NICLAUSSE, citizens of the Republic of France, residing at 24 Rue des Ardennes, Paris, France, have invented certain new and useful Improvements in and Relating to Boilers, of which the following is a specification.

The walls of the combustion chamber of boilers are usually made of refractory ma terial and this is especially the case with multi-tubulous boilers; such walls being exposed to direct radiation of the furnace and so to the highest temperature of the gases absorb large quantities of heat not useful in generating steam.

According to this invention the heating surface of the boiler and so its efliciency is considerably increased by replacing refractory walls with steam generating tubes or with headers carrying steam generating tubes. Preferably the headers and tubes are divided headers and compound tubes of the N iclausse type and in particular of the type in which the divided headers are provided with short compound tubes projecting into the combustion chamber which may be said to bristle with steam generating tubes.

The surfaces of the headers and tubes which are subjected to direct radiation from the furnace possess a considerable power of transmitting heat so greatly increasing the efficiency of the boiler.

The boiler, moreover, will wear longer as the active metal walls of the combustion chamber last longer than refractory walls which are usually rapidly destroyed. Also the weight and bulk of the boiler is less than in the usual construction.

The invention is illustrated in the accom' panying drawings in which Figures 1, 2 and 3 are respectively a transverse section, a half section and half longitudinal elevation and a section on the line 33, Figure 1.

Figure 4 is a diagrammatic section of short double tubes and divided header of the L lClELHSSG type.

Figures 5, 6, 7 and 8 show the invention applied to several types of boiler furnaces.

Referring to the drawings, A is the combustion chamber of a multi-tubulous boiler of known type, B its vaporizing bank, C a Water and steam drum, D a super-heater and E a feed water heater of a type forming the subject of another application.

The walls of chamber A are formed of divided headers a of the Niclausse type which carry very short compound circulation tubes 6 also of the Niclausse type, Wl'llCh preferably, and as illustrated, are inclined and project inwardly into chamber A. The elements a and Z) are supplied with Water from drum C through a pipe 6 and collectors (Z connecting together the bottoms of headers a, steam there generated passes into steam collectors 6 connecting together the tops of headers a and from thence to drum O through pipes f. This direct feed and take-off circuit is advantageous because of the intense generation of steam in the valporizing elements in the combustion cham- Feed water for drum C is derived in the ordinary manner from feed water heater E through pipe 9, cold Water passing into the bottom of heater E at h.

Steam generated in the vaporizing tubes passes from drum C to a superheater D through pipe 2' and passes out at is superheated.

The whole group of elements forming the boiler may be surrounded by a casing.

One methods of making the short vaporizing tubes is shown in Figure 4, in which a is a header divided into two chambers a and a by a partition Z the outer tube 6 leading into chamber a and inner tube m extending through partition Z into chamber (L The circulation of the water is from compartment a tube m, tube b, into compartment a Referring to Figures 5 to 8, the invention is shown applied respectively to a boiler having a hand grate F, to a boiler having an automatic grate G, to a boiler heated by gas and to a boiler heated by liquid fuel injected through burners H, but any known method of heating a boiler may be employed, as also any type of boiler.

lVhat we claim is The combination with a tubulous boiler, of a water and steam drum, of a combustion chamber whose walls comprise headers divided into two chambers, compound coaxial tubes carried by the internal sides of such headers, each of said compound tubes having a closed end and leading into one of said compartments, while the internal tubes of each of said compound tubes are open ended and lead into the other of said "in communication with said drum and connecting together the tops of those compartments in communication with the said external tubes.

In testimony whereof we aflix our signa- 10 'tures. I

ELIE PIERRE JULES NICLAUSSE. ALBERT LOUIS NICLAUSSE. 

